Database-Marketing: Calculator for Computing the Required Sample-Size

Database-Marketing Calculator

Calculating the Required Sample-Size

Expected Response Rate of Test-Group (i.e.: 2.5)
Allowed Percentage Error (i.e.: 0.20)
Confidence Level:	80% 85% 90% 95%
The required sample-size is:
The confidence range for the response-rate is between:	to

System Message:

When you want to test a new design of a direct mailing or simply change your offer, you may want to test this not on the total customer file but on a small selection. Large enough to give you correct answers, but certainly small enough to provide information on which you can rely.

In this case you should calculate the appropriate sample-size by using this calculator. It will tell you how big your sample should be so that you can draw the right conclusions out of it.

Attention !
These calculators are provided as is (mainly to demonstrate the techniques and tools of Database-Marketing) and we do not accept any responsibility for incorrect results. Although we have designed each of them with all of our experience - if you rely on the results you do so at your own risk.

And a technical note:
This form uses JavaScript for calculation of requested information. If it does not work with your browser then either your browser does not support JavaScript or you have explicitly deactivated the JavaScript-interpreter of your browser! In the first case you should upgrade to the latest version of the browser software - in the latter case you can activate JavaScript in the "Options"-menue of your browser.